I don't know of any relation with a Peter Mertens. However, there are several Mertens families in Missouri. Our ancestor, Henry John, went to St. Louis in 1848 for a year when he first arrived because he had connections (family?) there. He then moved to Saline Co. If there is any relationship between our line and the others, we have never been able to find it. I think there may be a link to a Theodore Mertens, who had a coal and ice business in St. Louis and died about 1900, because I found his obit in some family records, but the only family member who might be able to help says he knows nothing about any other members.